Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '23f7ca2ef153c3e630cc512412e687a0da760d48c0c3e3c040221927b7ba46d2' 
  AND token = 'LzjAs1yewnHn6OyT473Y3kXFpy2Pyuv9CarnW94RVKM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}